Patent US2938009A successfully refreshed from Google Patents.
US2938009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating silica with a siloxane and product thereof
Assignee: General Electric Co
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Filing: 1956-04-11
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Granted: 1960-05-24
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Expires: 1976-04-11
Abstract
No abstract record available.
Inventors
- 👤 Glennard R Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:58
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C08; C08K; C08K9/00; C08K9/04; C08K9/06; C01; C01P; C01P2004/00; C01P2004/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE PROCESS FOR REDUCING THE STRUCTURE AND KNIT TIME OF AN ORGANOPOLYSILOXANE CONVERTIBLE TO THE CURED, SOLID, ELASTIC STATE AND CONTAINING AN AVERAGE OF FROM 1.98 TO 2.05 ORGANIC GROUPS PER SILICON ATOM, IN WHICH THE STRUCTURE IS CAUSED BY THE PRESENCE OF A FINELY DIVIDED STRUCTURE-INDUCING FILLER SELECTED FROM THE CLASS CONSISTING OF SILICA AEROGEL, FUME SILICA, AND PRECIPITATED SILICA, WHICH PROCESS COMPRISES TREATING THE FILLER WITH OCTAMETHYLCYCLOTETRASILOXANE AT A TEMPERATURE OF FROM 150*C. TO 350*C. TO EFFECT DIFFUSION OF THE OCTAMETHYLCYCLOTETRASILOXANE THROUGH THE FILLER AND TO REMOVE AT LEAST SOME OF THE OCTAMETHYLCYCLOTETRASILOXANE, LEAVING BEHIND FINELY DIVIDED FILLER PARTICLES CONTAINING AN ADSORBED FILM OF THE OCTAMETHYLCYCLOTETRASILOXANE, AND THEREAFTER INCORPORATING THE TREATED FILLER IN THE SAID ORGANOPOLYSILOXANE.
Claim 2
Dependent Claim
118 words
THE PROCESS FOR REDUCING THE STRUCTURE AND KNIT TIME OF AN ORGANOPOLYSILOXANE CONVERTIBLE TO THE CURED, SOLID, ELASTIC STATE AND CONTAINING AN AVERAGE OF FROM 1.98 TO 2.05 ORGANIC GROUPS PER SILICON ATOM, IN WHICH THE STRUCTURE IS CAUSED BY THE PRESENCE OF A FINELY DIVIDED STRUCTURE-INDUCING FILLER SELECTED FROM THE CLASS CONSISTING OF SILICA AEROGEL, FUME SILICA, AND PRECIPITATED SILICA, WHICH PROCESS COMPRISES TREATING THE FILLER WITH OCTAMETHYLCYCLOTETRASILOXANE AT A TEMPERATURE OF FROM 150*C. TO 350*C. TO EFFECT DIFFUSION OF THE OCTAMETHYLCYCLOTETRASILOXANE THROUGH THE FILLER AND TO REMOVE AT LEAST SOME OF THE OCTAMETHYLCYCLOTETRASILOXANE, LEAVING BEHIND FINELY DIVIDED FILLER PARTICLES CONTAINING AN ADSORBED FILM OF THE OCTAMETHYLCYCLOTETRASILOXANE, AND THEREAFTER INCORPORATING THE TREATED FILLER IN THE SAID ORGANOPOLYSILOXANE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |